方法1:使用set函数 s=set(list),然后再list(s) 方法2:append def delList(L): L1 = [] for i in L: if i not in L1: L1.append(i) return L1 print(delList([1,2,2,3,3,4,5])) print(delList([1,8,8,3,9,3,3,3,3,3,6,3])) 方法3:count,remove def delList(L): for i in L: if
首先说下不正确的打开方式: 第一:使用for循环删除集合的元素,示例代码如下 ArrayList<String> list = new ArrayList<String>(Arrays.asList("a", "b", "c", "d")); for (int i = 0; i < list.size(); i++) { list.remove(i); } System.out.println(l
sub 删除多余工作表() Dim i As Integer Application.DisplayAlerts = False For i = Worksheets.Count To 1 step -1 If i >7 Then ThisWorkbook.Worksheets(i).Delete End If Next Application.DisplayAlerts = True End Sub
查询及删除重复记录的SQL语句 1.查找表中多余的重复记录,重复记录是根据单个字段(Id)来判断 select * from 表 where Id in (select Id from 表 group byId having count(Id) > 1) 2.删除表中多余的重复记录,重复记录是根据单个字段(Id)来判断,只留有rowid最小的记录 DELETE from 表 WHERE (id) IN ( SELECT id FROM 表 GROUP BY id HAVING C